Suppose a rod is given a negative charge by rubbing it with wool. Which one of the following statements is correct in this case ?

When two different materials are rubbed together, charging occurs through the transfer of electrons, which carry a negative charge. Protons, which carry a positive charge, are fixed within the atomic nuclei and cannot be transferred between objects during friction. In the specific case of rubbing a rod with wool, the direction of electron transfer depends on the materials' relative electron affinity. If the rod acquires a negative charge, it indicates that electrons have been stripped from the wool and transferred onto the rod. This gain of electrons gives the rod a net negative charge, while the wool, having lost electrons, becomes positively charged. Therefore, the correct statement is that negative charges (electrons) are transferred from the wool to the rod.